Heilig, Gerhard K. a Büttner, Thomas. Selected demographic aspects of a united Germany. Laxenburg: International Institute for Applied Systems Analysis, 1990. vii, 35 s. Working Paper; 33, July 1990.
Citace podle APAHeilig, G. K. (1990). Selected demographic aspects of a united Germany. Laxenburg: International Institute for Applied Systems Analysis.
Styl ChicagoHeilig, Gerhard K. Selected Demographic Aspects of a United Germany. Laxenburg: International Institute for Applied Systems Analysis, 1990.
Citace podle MLAHeilig, Gerhard K. Selected Demographic Aspects of a United Germany. Laxenburg: International Institute for Applied Systems Analysis, 1990.
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